Just for anyone else who runs into this, I created an uninstall batch file that I placed as a startup script using Group Policy. The script uninstalls the agent service and the usb defender service and deletes the files from the system.
It DOES NOT touch the registry so there may be some remnants left there. That shouldn't be an issue though since the programs that would access those keys are removed.
I use this methodology to globally uninstall software that doesn't support centralized removal.
Here is the script for anyone who may need it:
REM Set temporary folder to store log file in
set tempFolder=c:\temp
REM If log file exists, then the uninstall should already be complete and we can skip it
if exist "%tempfolder%\LEM-Agent-Uninstall.txt" Goto END
REM Make the folder if it doesn't exist, othewise move on to the UNINSTALL section
if exist %tempfolder% Goto UNINSTALL
mkdir %tempfolder%
:UNINSTALL
REM Stop LEM services
sc stop Contego_Spop >> "%tempfolder%\LEM-Agent-Uninstall.txt"
sc stop USB-Defender >> "%tempfolder%\LEM-Agent-Uninstall.txt"
REM Delete LEM services
sc delete Contego_Spop >> "%tempfolder%\LEM-Agent-Uninstall.txt"
sc delete USB-Defender >> "%tempfolder%\LEM-Agent-Uninstall.txt"
REM Delete LEM Folders
rmdir /S /Q "C:\Windows\SysWOW64\ContegoSPOP" >> "%tempfolder%\LEM-Agent-Uninstall.txt"
:END